Light-emitting device, lighting device, substrate, and manufacturing method of substrate

Abstract

To provide a substrate which is light and has high reliability and high light extraction efficiency from an organic EL element. To provide a substrate which includes a protective layer in a resin layer, an uneven structure on a light incident surface, and an opening which surrounds the uneven structure and through which the protective layer is exposed. To provide a light-emitting device which includes a resin layer provided with an uneven structure on a light incident surface over a protective layer, and a light-emitting element in the protective layer and a counter substrate which are bonded with a sealant. The protective layer and the resin layer have a property of transmitting visible light. The light-emitting element includes a light-transmitting first electrode over a resin layer, a layer containing a light-transmitting organic compound over the first electrode, and a second electrode over the layer containing a light-transmitting organic compound.

What is claimed is: 
     
       1. A light-emitting device comprising:
 a resin layer comprising an uneven structure at a top side of the resin layer; 
 a protective layer over the resin layer; and 
 a light-emitting element over the protective layer, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions, 
 wherein the uneven structure comprises projections each having a pitch, 
 wherein each of the plurality of light-emitting regions overlaps with the projections, 
 wherein each width of the plurality of light-emitting regions is smaller than the pitch, and 
 wherein the partitions are positioned so as to overlap ends of the projections. 
 
     
     
       2. The light-emitting device according to  claim 1 , further comprising:
 a planarization layer over the uneven structure, 
 wherein a refractive index of the planarization layer is greater than or equal to 1.6, and 
 wherein the light-emitting element is over the planarization layer. 
 
     
     
       3. A lighting device comprising the light-emitting device according to  claim 1  in a light-emitting portion. 
     
     
       4. The light-emitting device according to  claim 1 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property. 
     
     
       5. A light-emitting device comprising:
 a first resin layer comprising a first uneven structure at a bottom side of the first resin layer; 
 a protective layer over the first resin layer; 
 a second resin layer over the protective layer, the second resin layer comprising a second uneven structure at a top side of the second resin layer; and 
 a light-emitting element over the second resin layer, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions, 
 wherein the first uneven structure comprises projections each having a pitch, 
 wherein each of the plurality of light-emitting regions overlaps with the projections, 
 wherein each width of the plurality of light-emitting regions is smaller than the pitch, and 
 wherein the partitions are positioned so as to overlap ends of the projections. 
 
     
     
       6. The light-emitting device according to  claim 5 , further comprising:
 a planarization layer over the second uneven structure, 
 wherein a refractive index of the planarization layer is greater than or equal to 1.6, and 
 wherein the light-emitting element is over the planarization layer. 
 
     
     
       7. A lighting device comprising the light-emitting device according to  claim 5  in a light-emitting portion. 
     
     
       8. The light-emitting device according to  claim 5 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property. 
     
     
       9. A light-emitting device comprising:
 a substrate; 
 a light-emitting element over the substrate, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions; 
 a first resin layer over the light-emitting element, 
 the first resin layer comprising a first uneven structure at a bottom side of the first resin layer; 
 a protective layer over the first resin layer; and 
 a second resin layer over the protective layer, the second resin layer comprising a second uneven structure at a top side of the second resin layer, 
 wherein the second uneven structure comprises projections each having a pitch, 
 wherein each of the plurality of light-emitting regions overlaps with the projections, 
 wherein each width of the plurality of light-emitting regions is smaller than the pitch, and 
 wherein the partitions are positioned so as to overlap ends of the projections. 
 
     
     
       10. The light-emitting device according to  claim 9 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property. 
     
     
       11. A lighting device comprising the light-emitting device according to  claim 9  in a light-emitting portion. 
     
     
       12. A light-emitting device comprising:
 a first resin layer, the first resin layer comprising a first uneven structure at a bottom side of the first resin layer; 
 a first protective layer over the first resin layer; 
 a second resin layer over the first protective layer, the second resin layer comprising a second uneven structure at a top side of the second resin layer; 
 a light-emitting element over the second resin layer, the light-emitting element comprising a plurality of light-emitting regions which are separated from each other by partitions; 
 a third resin layer over the light-emitting element, 
 the third resin layer comprising a third uneven structure at a bottom side of the third resin layer; 
 a second protective layer over the third resin layer; and 
 a fourth resin layer over the second protective layer, the fourth resin layer comprising a fourth uneven structure at a top side of the fourth resin layer, 
 wherein each of the first uneven structure and the fourth uneven structure comprises projections each having a pitch, 
 wherein each of the plurality of light-emitting regions overlaps with the projections, 
 wherein each width of the plurality of light-emitting regions is smaller than the pitch, and 
 wherein the partitions are positioned so as to overlap ends of the projections. 
 
     
     
       13. The light-emitting device according to  claim 12 , wherein the light-emitting element comprises a light-emitting layer including an organic compound having a light-emitting property. 
     
     
       14. A lighting device comprising the light-emitting device according to  claim 12  in a light-emitting portion.